AFE4400RHAR

Analog Front End (AFE) Overview

The AFE4400RHAR is an integrated analog front-end (AFE) designed for heart rate monitors and low-cost pulse oximeters. Manufactured by Texas Instruments, it features a single channel with 22-bit resolution and a sampling rate of 1.3 kS/s. The device operates on a supply voltage ranging from 2 V to 3.6 V and communicates via Serial or SPI interfaces. It is housed in a VQFN-40 package suitable for surface mount installation. The component supports operation within a temperature range of 0°C to +70°C and exhibits a power dissipation of 2.84 mW.

Analog Front End (AFE) Feature Summary

• Integrated analog front-end optimized for heart rate monitoring and pulse oximetry applications
• 22-bit resolution ADC with 1.3 kS/s sampling rate for high-fidelity signal acquisition
• Low power consumption of 2.84 mW with operating voltage range of 2 V to 3.6 V
• Compact VQFN-40 package design facilitating integration into wearable and portable devices

Analog Front End (AFE) Applications

• Heart rate monitor systems
• Low-cost pulse oximeter devices
• Wearable health monitoring electronics

Analog Front End (AFE) Part Context

The AFE4400RHAR belongs to the AFE4400 series from Texas Instruments, specifically tailored for optical biosensing. It integrates necessary components for processing photoplethysmography (PPG) signals, distinguishing it from general-purpose data converters. The RHAR suffix indicates the specific tape-and-reel packaging variant within this product line.

Analog Front End (AFE) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical specifications against alternative TI AFE models such as the AFE4490 or AFE4403 before implementation.